TeV Gamma-Ray Sources from a Survey of the Galactic Plane with Milagro

Details TeV Gamma-Ray Sources from a Survey of the Galactic Plane with Milagro TeV Gamma-Ray Sources from a Survey of the Galactic Plane with Milagro

2007-05-04

arxiv.org/abs/0705.0707v1

Astrophys.J.664:L91-L94,2007

Astronomy and Astrophysics

Astrophysics

Submitted to ApJ

Scientific paper

10.1086/520717

A survey of Galactic gamma-ray sources at a median energy of ~20 TeV has been performed using the Milagro Gamma Ray Observatory. Eight candidate sources of TeV emission are detected with pre-trials significance $>4.5\sigma$ in the region of Galactic longitude $l\in[30^\circ,220^\circ]$ and latitude $b\in[-10^\circ,10^\circ]$. Four of these sources, including the Crab nebula and the recently published MGRO J2019+37, are observed with significances $>4\sigma$ after accounting for the trials involved in searching the 3800 square degree region. All four of these sources are also coincident with EGRET sources. Two of the lower significance sources are coincident with EGRET sources and one of these sources is Geminga. The other two candidates are in the Cygnus region of the Galaxy. Several of the sources appear to be spatially extended. The fluxes of the sources at 20 TeV range from ~25% of the Crab flux to nearly as bright as the Crab.

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